Is anger over being asked for money in exchange for guarding shoes in the mosque forbidden because it violates the Hadith "Do not get angry"? And is it permissible to fight in self-defense of money in this case?

A person who volunteers to guard shoes without being asked does not deserve a wage. There is no sin in anger that does not lead to wrongful action, nor does it contradict the prohibition mentioned in "Do not get angry," for the Sacred Law praises those who suppress their rage. It is permissible to defend one's property to the extent of repelling aggression; whoever is killed defending his property is a martyr, and whoever fights him is in the Hellfire.